MCQOPTIONS
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MCQOPTIONS
This section includes 6820 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
How does water transport in plants? |
| A. | by cambium |
| B. | by phloem |
| C. | by xylem |
| D. | By the epidermis |
| Answer» D. By the epidermis | |
| 802. |
What happens in transpiration? |
| A. | Water comes out as ice from leaves |
| B. | Water comes out as vapor from the leaves |
| C. | Water comes out in the form of a drop from the husks |
| D. | Oxygen is released from the husbands |
| Answer» C. Water comes out in the form of a drop from the husks | |
| 803. |
What is the membrane of mitochondria impermeable to? |
| A. | for pyruvic acid |
| B. | for NADH |
| C. | for ATP |
| D. | for the mallet |
| Answer» C. for ATP | |
| 804. |
The condition in which transpiration will be more rapid is |
| A. | low wind speed |
| B. | low humidity and high temperature |
| C. | high humidity |
| D. | excess amount of water in the ground |
| Answer» C. high humidity | |
| 805. |
The loss of water in the form of vapor from the aerial parts of the plant is called? |
| A. | osmosis |
| B. | respiration |
| C. | Photosynthesis |
| D. | transpiration |
| Answer» E. | |
| 806. |
Which is the first stable compound of photosynthesis? |
| A. | phosphoglyceric acid |
| B. | starch |
| C. | glucose |
| D. | diphosphoglyceric acid |
| Answer» D. diphosphoglyceric acid | |
| 807. |
What is the end product of glycolysis? |
| A. | glucose |
| B. | pyruvic acid |
| C. | ethyl alcohol |
| D. | methyl alcohol |
| Answer» C. ethyl alcohol | |
| 808. |
Excessive use of fertilizers causes the death of plants? |
| A. | due to osmosis |
| B. | Due to external osmosis |
| C. | because of exploitation |
| D. | due to inflation |
| Answer» C. because of exploitation | |
| 809. |
Seeds flower when placed in water? |
| A. | due to osmosis |
| B. | So because of exploitation |
| C. | due to hydrolysis |
| D. | due to cytoplasmic |
| Answer» C. due to hydrolysis | |
| 810. |
As a result of which process the release of oxygen in plants leads to the absorption of carbon dioxide? |
| A. | Photosynthesis |
| B. | transpiration |
| C. | osmosis |
| D. | Diffusion |
| Answer» B. transpiration | |
| 811. |
A cell grows in volume when it is placed in? |
| A. | in a homogeneous solution |
| B. | in a hypertonic solution |
| C. | in a hypotensive solution |
| D. | none of these |
| Answer» D. none of these | |
| 812. |
Is carbon dioxide gas released? |
| A. | Under Rasarohan |
| B. | Under transpiration |
| C. | Under photosynthesis |
| D. | Under respiration |
| Answer» E. | |
| 813. |
One of the actions in plants, which can lower their temperature, is |
| A. | Photosynthesis |
| B. | transpiration |
| C. | hydrolysis |
| D. | respiration |
| Answer» C. hydrolysis | |
| 814. |
What is the lowest rate of photosynthesis? |
| A. | in red light |
| B. | in blue light |
| C. | in purple light |
| D. | in green light |
| Answer» D. in green light | |
| 815. |
Where does most of the photosynthetic activity take place? |
| A. | in the blue and red regions of light |
| B. | in the green and yellow areas of light |
| C. | in the blue and orange region of light |
| D. | in the purple and orange regions of light |
| Answer» B. in the green and yellow areas of light | |
| 816. |
Husbands have two main functions? |
| A. | transpiration and respiration |
| B. | Respiration and digestion |
| C. | Photosynthesis and respiration |
| D. | photosynthesis and transpiration |
| Answer» E. | |
| 817. |
What is the role of foliage in photosynthesis? |
| A. | water absorption |
| B. | light absorption |
| C. | CO₂ |
| D. | none of these |
| Answer» C. CO₂ | |
| 818. |
When a cell is placed in a solution containing more salt, it shrinks? Because . . . |
| A. | saline water enters the cell |
| B. | water comes out by external osmosis |
| C. | The cytoplasm disintegrates. |
| D. | Mineral salt breaks down cell wall |
| Answer» C. The cytoplasm disintegrates. | |
| 819. |
What is the highest rate of photosynthesis? |
| A. | in purple light |
| B. | in green light |
| C. | in blue light |
| D. | in red light |
| Answer» E. | |
| 820. |
By which of the following energy transformations is the process of photosynthesis carried out? |
| A. | fixation of carbon dioxide |
| B. | Stimulation of chlorophyll by sunlight |
| C. | release of oxygen into water |
| D. | manufacture of carbohydrates |
| Answer» C. release of oxygen into water | |
| 821. |
The turning of a shoot moving towards the sunlight is called? |
| A. | photosynthesis |
| B. | radiance |
| C. | heliotropism |
| D. | hydrotropism |
| Answer» D. hydrotropism | |
| 822. |
If a cell is reduced in size when it is placed all in a solution. Is there such a solution? |
| A. | hypotonic |
| B. | hypertonic |
| C. | isotonic |
| D. | satisfied |
| Answer» C. isotonic | |
| 823. |
The process of preparing food for plants and trees is called? |
| A. | Carbohydrolysis |
| B. | metabolic synthesis |
| C. | Photosynthesis |
| D. | Photosynthesis |
| Answer» E. | |
| 824. |
Which one of the following plant hormones keeps the seeds dormant and plays a major role in the dissolution of leaves? |
| A. | Auxin |
| B. | Gibberellin |
| C. | cytokinins |
| D. | abscisic acid |
| Answer» E. | |
| 825. |
What is the meaning of ATP? |
| A. | adenosine triphosphate |
| B. | adenine triphostat |
| C. | adenine tetraphosphate |
| D. | adenosine tetraphosphate |
| Answer» B. adenine triphostat | |
| 826. |
The deficiency of which element causes Khaira disease or Laghupat disease of paddy? |
| A. | Such as |
| B. | Copper |
| C. | magnesium |
| D. | calcium |
| Answer» B. Copper | |
| 827. |
The biological process in which sugars and fats are oxygenated and energy is released is called? |
| A. | respiration |
| B. | transpiration |
| C. | Photosynthesis |
| D. | fermentation |
| Answer» B. transpiration | |
| 828. |
Due to whose deficiency is the blasphemy of husbands? |
| A. | That |
| B. | Mg |
| C. | Mo |
| D. | With |
| Answer» C. Mo | |
| 829. |
Does stomatal transpiration stop? |
| A. | in the night |
| B. | in the evening |
| C. | at the morning |
| D. | none of these |
| Answer» E. | |
| 830. |
Vitel disease of cauliflower is caused by the deficiency of which element? |
| A. | Zn |
| B. | Mo |
| C. | With |
| D. | Mg |
| Answer» C. With | |
| 831. |
Do wooden doors swell in the rainy season? |
| A. | due to interosmosis |
| B. | because of exploitation |
| C. | due to capillarity |
| D. | due to plasmacyte |
| Answer» C. due to capillarity | |
| 832. |
Plant movement induced by external stimuli is called? |
| A. | induced motion |
| B. | autonomous motion |
| C. | vibration speed |
| D. | Trap speed |
| Answer» D. Trap speed | |
| 833. |
Which metal ion is found in chlorophyll? |
| A. | Iron |
| B. | magnesium |
| C. | Such as |
| D. | cobalt |
| Answer» C. Such as | |
| 834. |
What is the source of oxygen produced during photosynthesis? |
| A. | water |
| B. | Carbon dioxide |
| C. | chlorophyll |
| D. | mesophyll cells |
| Answer» B. Carbon dioxide | |
| 835. |
What comes out in the process of photosynthesis? |
| A. | hydrogen |
| B. | Carbon dioxide |
| C. | oxygen |
| D. | chlorine |
| Answer» D. chlorine | |
| 836. |
Where does transpiration take place in a plant? |
| A. | root |
| B. | stem |
| C. | leaf |
| D. | whole plant |
| Answer» E. | |
| 837. |
Another name for endole acetic acid is? |
| A. | Enzyme |
| B. | fungicide |
| C. | amino acids |
| D. | Auxin |
| Answer» E. | |
| 838. |
Do plants grow? |
| A. | for life |
| B. | only for a specified period |
| C. | intermittently throughout life |
| D. | plants do not grow |
| Answer» B. only for a specified period | |
| 839. |
What is the movement of a mimosa leaf? |
| A. | photosynthesis |
| B. | Vibration |
| C. | sniper speed |
| D. | Superficiality |
| Answer» C. sniper speed | |
| 840. |
Are there auxins? |
| A. | growth stimulator |
| B. | growth destroyer |
| C. | growth hormone |
| D. | growth inhibitor |
| Answer» D. growth inhibitor | |
| 841. |
Which gas is necessary for photosynthesis? |
| A. | O₂ |
| B. | CO |
| C. | N₂ |
| D. | CO₂ |
| Answer» E. | |
| 842. |
Name of which Indian scientist is associated with plant growth titration? |
| A. | NS . G. Khurana |
| B. | C . V. Raman |
| C. | J. C . boss |
| D. | Meghnath Saha |
| Answer» D. Meghnath Saha | |
| 843. |
The growth motions of plants which are due to the stimulation of light are called? |
| A. | geotropism |
| B. | heliotropism |
| C. | hydrotropism |
| D. | thigmotropism |
| Answer» C. hydrotropism | |
| 844. |
What is fruit ripening hormone? |
| A. | Gibberellin |
| B. | Ethylene |
| C. | cytokinins |
| D. | Auxin |
| Answer» C. cytokinins | |
| 845. |
What is a photosynthetic organ? |
| A. | mitochondria |
| B. | lysosomes |
| C. | ribosome |
| D. | green cover |
| Answer» E. | |
| 846. |
When the growth in terms of time and size is plotted on the graph, aSshaped curve is formed, which is called? |
| A. | sigmoid curve |
| B. | respiratory curve |
| C. | osmotic curve |
| D. | emission curve |
| Answer» B. respiratory curve | |
| 847. |
Sundew and Venus fly trap Insectivorous plants move in? |
| A. | vibratory speed |
| B. | tactile motion |
| C. | sniper speed |
| D. | none of these |
| Answer» C. sniper speed | |
| 848. |
Which of the following is a weed killer? |
| A. | N . A . A . |
| B. | 2 , 4 - D |
| C. | A . B . A |
| D. | G . A |
| Answer» C. A . B . A | |
| 849. |
Roots have positive geotropism? |
| A. | Always |
| B. | majority of |
| C. | sometimes |
| D. | Never |
| Answer» C. sometimes | |
| 850. |
What is an essential component for the process of photosynthesis? |
| A. | CO₂ |
| B. | Water |
| C. | chlorophyll |
| D. | All of the above |
| Answer» E. | |